Solar resource assessment jobs

Solar Resource Assessment Jobs in Renewable Energy

Solar resource assessment measures and models how much sunlight reaches a site, as global, direct, and diffuse irradiance, and turns it into a bankable estimate of what a PV plant will produce over its life. It is the analysis that decides whether a project can borrow money, and on what terms.

Why the numbers carry so much weight

Sunshine varies more from year to year than most people assume. In its review of 2025, Solargis found irradiance more than 10% above the long-term average across much of the UK and Benelux, while parts of Central America ran 7 to 12% below it. A lender cannot treat a single year as representative, so the assessor's job is to estimate the long-term resource and, just as importantly, the uncertainty around it.

The core deliverable is an energy yield assessment expressed as probabilities. Analysts combine one to two decades of satellite-derived irradiance with on-site measurements from pyranometers, correct the satellite record against the ground data, and simulate the plant in software such as PVsyst to produce a P50, the output the plant is expected to exceed in half of all years, and a P90, the output it should exceed in nine years out of ten. As pv magazine explains, financiers ask for P90 or P99 figures rather than the P50, because debt has to be repaid in a poor year too. An error of a few per cent in the resource therefore flows straight into how much debt a project can raise.

Two very different jobs under one label

The tag covers two ends of the market. At the specialist end, energy yield engineers and solar meteorologists model irradiance, soiling, shading, and losses for utility-scale solar plants seeking project finance, working for technical advisers, data providers, and the in-house teams of developers such as OX2. Their work sits close to solar PV engineering, since yield and design decisions such as tracker choice and row spacing feed into each other.

At the residential end, most of the openings tagged here come from rooftop solar installers such as Sunrun, Momentum Solar, and Solar Landscape, where site assessors and surveyors check roof orientation, shading, and structure for a single building, and appointment setters book those visits. The skills and pay barely overlap with the specialist end, so candidates should read the listing carefully. Between them sit design engineers and "chargés d'études photovoltaïques" at installers and EPC contractors such as IRISOLARIS and IBC SOLAR, and research posts at institutes such as AMOLF in Amsterdam.

Where the field is heading

Two changes shape current hiring. Sub-hourly irradiance data, at 5 to 15 minute resolution, is replacing hourly averages because it captures the midday inverter clipping that hourly data hides, which matters more as plants are built with high DC-to-AC ratios and batteries. And the same satellite data now feeds both pre-construction studies and live generation forecasting for operating plants. Analysts who also know wind resource assessment are valued on hybrid sites that need a single, defensible yield case for both technologies.